The world's most widespread early civilization was built on baked bricks

History · Published 27 October 2026 Swipe more like this →

In short: While ancient Egypt and Mesopotamia were establishing their own empires, the Indus Valley Civilisation was perfecting urban life on a massive scale. From sophisticated drainage systems to planned cities housing tens of thousands, it was a Bronze Age marvel of engineering and trade that remains a cornerstone of South Asian history.

The Indus Valley Civilisation (IVC), also known as the Harappan Civilisation, flourished between 3300 BCE and 1300 BCE. It reached its mature form from 2600 BCE to 1900 BCE, making it one of the three great early civilisations of the Near East and South Asia. Notably, it was the most widespread of these three. The civilisation was characterized by advanced urban planning, featuring baked brick houses, elaborate water supply systems, and complex drainage. The scale of these settlements was significant. Major cities like Mohenjo-daro and Harappa likely contained between 30,000 and 60,000 individuals. During its peak, the entire civilisation may have supported a population of between one and five million people. These urban centers were supported by sophisticated handicraft techniques, such as seal carving and carnelian production, as well as metallurgy involving copper, bronze, lead, and tin.

The civilization's rise and fall are tied to environmental shifts. Gradual soil drying in the 3rd millennium BCE may have sparked initial urbanisation, but weaker monsoons and reduced water supplies eventually led to its demise, forcing populations to scatter eastward and southward. Following the decline of the Harappan culture around 1500 BCE, the Vedic period emerged. This era saw the composition of the Vedas—liturgical texts that form the basis of modern Hinduism—and a transition toward a settled agricultural life in the Ganges Plain facilitated by the adoption of iron tools.

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